choline-based ionicliquid [Ch-OSO3H] was prepared and used as a novel catalyst for the synthesis of α-aminophosphonates via a one-potthree-componentreaction with aldehydes, amines, and triethyl phosphite/diethyl phosphite at room temperature under solvent-free conditions or in aqueous media. The reaction was completed in short times and products could be simply separated from the reaction mixture in